12/14T Oversized Pulley Set Shim R9100, Cross - Blk

- A fresh look at pulley design, maximizing pulley size and improving pedaling performance for any derailleur\n- Redesigned pulley teeth provide better chain retention and accurate shifts every time\n- Updates to newest version include: increased stiffness using A-shaped pillars between the bearings and teeth, maximized tooth count for every derailleur helps deliver optimal drivetrain performance, and enhanced visual design achieves a more cohesive look across the different models\n- Cross seals are built for leaving the beaten path, offering the best durability, regardless of the weather conditions